Heater



W. J. GROSS.

HEATER. APPLICATION FiLED DEC. 22, 1919.

Patented Nov. 30,1920,

2 SHEETS-SHEET Inventor.

William J Grass. 6 @31 g y AZIfo may W. J. GROSS.

I HEATER.

APPLICATION FILED DEC-22, WW.

1 60,934, 1 Patented Nov. 30, 1920.

2 $HEETSSHEET 2- w a In ventor: William J Gross g attzney.

7 UNITED STAT ES PATENT OFFICE.

WILLIAM J. GROSS, OF ST. PAUL, MINNESOTA.

HEATER.

Specification of Letters Patent. Patented N". 30, 1920.

Application filed December 22, 1919. Serial No. 346,451.

- an economical and efficient heating device for compartments, such asstorerooms and garages, and particularly to keep the temperature of suchcompartments above freezing at a small expense.

A further object is to quickly distribute the hot air from the heaterthrou hout a compartment and cause it to mingle with the colder air.

In the drawings Figure 1 is a side elevation of my heater with a portionof the casing of the stove broken away to show diagrammatically theinternal construction, and Fig. 2 is a perspective view of the airheating and mixing attachment.

Referring to the drawings the letter A indicates the stove and B the airheating and mixing attachment used in my heater. The stove A may be ofany suitable form, preferably one in which liquid or gaseous fuel isused, the particular stove illustrated in the drawing being a kerosenestove of the vapor burning type. The air heating'and mixing attachment Bcomprises a cold air flue 10, a hood 11. and a hot air stack12. The flue10 opens at its upper end into the stack 12andat its lower end near thefloor of the compartment to be heated, and is divided from the hood 11by a transverse partition 13 extending from the top of the stove to apoint slightly below the top of the hood 11. The sides of the hood 11are vertical, while the front thereof slopes outward from its line ofunion with the stack 12 to a line slightly above the top of the stove,where it is provided with a vertical flange 14, which in conjunctionwith the lower portions of the sides of the hood and the front Wall ofthe flue 10 form a substantially air-tight union with the top 15 of thestove. The apex of the hood 11 opens into the stack 12, forming thethroat 16 of the stack. Air to supply proper combustion is furnishedthrough a series of perforations 17 in the side walls of the hood. Thestack 12 opens into the compartment to be heated nearits ceiling.

A baflle plate 20 is suitably attached to the flange 14 and extendsdiagonally into the hood to separate the current of air entering theperforations 17' from that entering the perforations 17, and the airbetween the baffle and front of the hood, after being warmed, is drawnthrough the throat 16 with the hot air from the stove.

In operation, air heated by the stove A V rises through the hood 11,and, mingling with the warm air drawn through the perforations 17,produces at the throat 16 a strong draft, which draws cold air from nearthe floor of the compartment into the flue 10 through the opening 18,and this cold air mixes with the hot air passing from the throat 16 intothe stack 12, whence the warm air produced by the mixture is dischargedthrough the opening 19 into the upper portion of the compartment to beheated.

I prefer to make the cross sectional area of the cold air flue aboutfour-fifths (-5. that of the throat 16, and about four-sevenths (5:)that of the stack 12, but good results may be obtained within the limitsof considerable variation from these proportions.

Having described my invention what I claim as new and desire to protectby Letters Patent is:

1. In a heater, a stove, a hood fitting the to of said stove, a cold airflue extending be ow said hood and opening at its base into thecompartment to be heated, and a stack opening at its lower extremityinto said flue and hood and at its upper end into the compartment to beheated.

2. In a heater, a stove, a hood tapering upward and formed at its topwith a narrow throat, a cold air flue open at its base and separatedfrom said hood by a vertical partition, and a stack provided with anoutlet at its top and at its base opening into said throat and flue.

3. In a heater a stove, a hood adapted to fit snugly over the topthereof and formed at its top with a throat, a cold air flue separatedfrom said hood by a vertical partition and a stack provided with anoutlet at its top into the compartment to be heated and at its basemerging into said throat and flue.

LIn a heater, a stove, an upwardly diminishing hood formed at its basewith a plurality of perforations and at its top with a narrow throat, acold air flue separated from said hood by a vertical partition'andopening at its base into the compartment to i 5 be heated, and a stackprovided with an outlet at its top into the compartment to be heated andat its base opening into said throat and fine. f 5. In a heater, astove, an upwardly di- 10; minishing hood formed at its base with a fpluralityof perforations for the admission of air, a diagonally arrangedbaffle plate WILLIAM J. GROSS.

